The Complexity of Boundedness for Guarded Logics

The Complexity of Boundedness for Guarded Logics
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受保护逻辑的有界性的复杂性

DOI:
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发表时间:
2015
期刊:
2015 30th Annual ACM/IEEE Symposium on Logic in Computer Science
影响因子:
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通讯作者:
M. V. Boom
M. V. Boom
中科院分区:
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文献类型:
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作者:
Michael Benedikt;B. T. Cate;Thomas Colcombet;M. V. Boom

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给定X中的公式PHI(X,X)阳性,有限的NESS问题询问PHI引起的固定点是否在某些均匀的结合内到达独立于结构(即固定点是虚假的),实际上可以捕获通过公式的有限展开)。在本文中,我们研究PHI处于受保护的片段或一阶逻辑的否定片段或这些逻辑的固定点扩展时,我们研究了有限的NES问题。众所周知,受保护的逻辑具有许多理想的计算和模型理论属性,包括在某些情况下可确定的界限。我们证明,在基本时期,有界的ness是可以决定的,并且利用colcombet的未发表的结果,甚至是2Exptime-Complete。我们的证明扩展了受保护的逻辑和自动机之间的连接,将守卫逻辑的有限的NESS减少到有关树上成本自动机的问题,这是一种带有计数器的自动机,将自然数字分配给每个输入,而不仅仅是布尔值。
Given a formula phi(x, X) positive in X, the bounded ness problem asks whether the fix point induced by phi is reached within some uniform bound independent of the structure (i.e. Whether the fix point is spurious, and can in fact be captured by a finite unfolding of the formula). In this paper, we study the bounded ness problem when phi is in the guarded fragment or guarded negation fragment of first-order logic, or the fix point extensions of these logics. It is known that guarded logics have many desirable computational and model theoretic properties, including in some cases decidable bounded ness. We prove that bounded ness for the guarded negation fragment is decidable in elementary time, and, making use of an unpublished result of Colcombet, even 2EXPTIME-complete. Our proof extends the connection between guarded logics and automata, reducing bounded ness for guarded logics to a question about cost automata on trees, a type of automaton with counters that assigns a natural number to each input rather than just a boolean.
有界问题的可判定性结果
DOI: 10.2168/lmcs-10(3:2)2014
发表时间: 2011
期刊: Log. Methods Comput. Sci.
影响因子: --
作者:
Achim Blumensath;Martin Otto;Mark Weyer
通讯作者: Mark Weyer
带有保护否定的查询
DOI: 10.14778/2350229.2350250
发表时间: 2012
期刊: Proc. VLDB Endow.
影响因子: --
作者:
V. Bárány;B. ten Cate;M. Otto
通讯作者: M. Otto